I have ridden an old GT Zaskar mountain bike for the last 11 years. It has been used and abused, but still no cracks or signs of failure. My friend's bike just recently cracked and fell into pieces and it worries me that I ride an old frame.

The frame is 6061-T6 aluminum and almost as thin as a coke can.

Is it possible to send the bike through a heat-treating process to bolster it's integrity to avoid fatigue-enduced failure?